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a+b+c 903    a +b 684  b+c 598

Răspuns :

c=903-684=219,b=598-219=379,a egal cu 684minus 598=86
a+b+c=903
a+b=684
b+c=598
684+c=903
c=903-684
c=219
b+219=598
b=598-219
b=379
a+379=684
a=684-379
a=305
Verificare : 305+379+219=903